<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>

		<style>
			div strong {
				color: blue;
				font-size: 36px;
			}
		</style>
	</head>
	<body>

		<h1>学习CSS</h1>


		<div>
			<strong>p标签内部的 strong</strong>
		</div>

		<div>
			<p>
				<strong>p标签内部的 strong</strong>
			</p>
		</div>
		<strong>p标签内部的 strong</strong>

		
		
		



	</body>
</html>